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Finding the Fourth Proportional to 790.63, 1,186.33 and 425.37

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Solution

The fourth proportional to 790.63, 1,186.33 and 425.37 is: 638.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.63 : 1,186.33 = 425.37 : x
  2. Step 2: Convert to fraction form
    790.63/1,186.33 = 425.37/x
  3. Step 3: Cross multiply
    790.63x = 1,186.33 × 425.37
  4. Step 4: Simplify right side
    790.63x = 504,627.07
  5. Step 5: Solve for x
    x = 504,627.07/790.63
  6. Step 6: Final answer
    x = 638.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.